Improvement in padlocks



"F: W. lscHULTzE s. LIE. smnE'L.

PADL'OC-K. N0.176,759. Patented May 1.1876.

FIGB FIGS l @man y l Mmm maf mm. v Mw I mamey'N-PETERS.FHOTU-LITHOGRAPHEFL WASHINGTON. D. C.

UNITED STATES PATENT OEEIGE.

FREDERICK W. SOHULTZE AND LOUIS H. SVEIDEL, OF PHILADELPHIA, PA.

IMPROVEMENT 1N PApLocKs.

Specification forming part of Letters Patent No. 176,759, dated May 2,1876; application tiled January 15, 1876.'

To all whom it may concern:

Be it known that we, FREDERICK W. SGHULTZE and LOUIS H. SEIDEL, ofthecity and county of Philadelphia and State of Pennsylvania, have inventeda new and useful Improvement in Double-Acting Tumbler- Locks, of whichthe following is a speciiication, reference being had to theaccompanying drawings. Y

We have any desirable number of tumblers hung on a center pin of thecase. These tumblers have, respectively, projections of differentlengths on one arm, which connect with a shoulder of the shackle whenthe latter is swung into its closed position. They also have on anotherarm a pointed escape projection. These points of one tumbler are of thesame distance apart as in all the other tumblers,

Aand the outer point of the shoulder of the shackle and another point ofthe same are of the saine distance apart, so that when the lockingprojections of the tumblers are brought into such position as to admitof the lockingpoint of the shackle escaping them for the latter to swinginto its unlocked position, the v other pointv of the .shackle will alsoescape the points of. the Alother arms of the tumblers The bits of thekey are so formed in relation to the points of their contact with thetumblers as to bring the locking-points and the escape-points,respectively, of the tumblers in range when the tumblers are brought totheir unlocking position.

111 theaccompanying drawings, Figure 1 is a side view of the lock, withthe cap-plate removed, to show the construction and arrangement oftheinterior.. Fig. 2 is a cross-section, at the line .fr m of Fig. l, Withthe cap-plate B in connection. Figs. 3, 4, 5, 6, and 7, are i'ace viewsof the tumblers. Figs. S and 9 are a face and edge view, respectively,oi' the lever I. Figs. 10'and 11 are like views ofthe key H.

Like letters of reference in all the figure indicate the same parts.

A is the case of the lock, and B the capplate. C is the shackle, whichis hung on the pin a, and D, D1, D2, D3, and D4 are tumblers, which arehung on the pin b in the center of the case A. The shackle has a`shoulder, d, with which the projections e of the arms 1 ofthe tumblersconnect to hold the shackle in its locked position. The projections care of di'erent lengths, each varying from all the others from thetumbler D to the tumbler D4. The shackle has an escapement-point, g, andthe tumblers an escapement-point, h, ot the arm 2. 'Ihesey points of allthe tumblers are equidistant from the projection c of the arm 1, so thatwhen the tumblers are brought into the unlocking position the point g ofthe shackle will escape all of them. The bits t of the key H vary inlength corresponding, respectively, to the varying lengths of theprojections e of the arms l of the tumblers, and the parts of the arms 2of the same, against which the bits bear,V

being constructed accordingly. When the key is pushed inward through thekey-hole j of the case A, until the stops k 7c come against thelatter,the lookin g projections of the tum- 4 blers are all freed from thelocking-shoulder of the shackle, and the escapement-points heiligequidistant from the locking projections of all the tumblers, the pointg ofthe shackle escapes them all, and thus allows the shackle to beswung into its unlocked position. Iis a lever, which, by the action ofthe spring J, automatically closes the key-holo for keeping out thedirt, and to make the lock more difficult to be picked by obstructingthe movement about of a picking instrument. It also serves to retain thekey in its place until the shackle is again brought into its lockingposition. The key is then withdrawn. The springs K, which engage withthe shackle C, as seen in Fig. l, serve to close it when the key iswithdrawn. By means ot' the escape-points of the arms 2 of the tumblersa Very slight difference in length would prevent the lock being openedby another key that had the slightest error in the length of its bits,because such variation from the right bit would cause a lapping of theescape-points, and thereby prevent the unlocking ofthe shackle.

We claim as our invention- The double-acting tumblers, having lockingprojections c of different lengths and escapement-points h, incombination with the shackle C, having upon its heel a locking-shoulder,d, and escapemcnt-point g, substantially as and for the purpose setforth.

FREDERICK W. SOHULTZE. LOUIS H. SEIDEL.

Witnesses:

THOMAS J. BEWLEY, GEORGE O. HEZEL.

